package com.tude._07vehicle.base.filters;

import com.tude._07vehicle.pojo.vo.UserVO;
import lombok.extern.slf4j.Slf4j;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Slf4j
@WebFilter(filterName = "loginCheckFilter", urlPatterns = {"/v1/vehicle/*"})
public class LoginCheckFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        log.debug("过滤器初始化方法，在服务器启动时调用一次");
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        log.debug("进入过滤器的核心过滤方法");
        // HttpServletRequest是ServletRequest的子接口
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;

        UserVO userVO = (UserVO) request.getSession().getAttribute("user");
        if (userVO != null) {
            // 放行
            filterChain.doFilter(request, response);
        } else {
            response.sendRedirect("/login.html");
        }
    }

    @Override
    public void destroy() {
        log.debug("过滤器销毁方法，在服务器关闭时调用一次");
    }
}
